DAGNEW, T. .; BANTIE, Z. . Process optimization of Cr(VI) removal from aqueous solution using activated orange peel for treatment of tannery wastewater. Ethiopian Journal of Science and Technology, [S. l.], v. 16, n. 1, p. 51–75, 2025. Disponível em: https://journals.bdu.edu.et/index.php/EJST/article/view/2891. Acesso em: 4 feb. 2026.